Super D-branes from BRST Symmetry

Recently a new formalism has been developed for the covariant quantization of superstrings. We study properties of Dp-branes and p-branes in this new framework, focusing on two different topics: effective actions and boundary states for Dp-branes. We present a derivation of the Wess-Zumino terms for super (D)p-branes using BRST symmetry. To achieve this we derive the BRST symmetry for superbranes, starting from the approach with/without pure spinors, and completely characterize the WZ terms as elements of the BRST cohomology. We also develope the boundary state description of Dp-branes by analyzing the boundary conditions for open strings in the completely covariant (i.e., without pure spinors) BRST formulation.Comment: 31 pp; journal version, expended discussion of D-brane pure spinor constraints in Section 2.

Search for jet extinction in the inclusive jet-pT spectrum from proton-proton collisions at s=8 TeV

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.The first search at the LHC for the extinction of QCD jet production is presented, using data collected with the CMS detector corresponding to an integrated luminosity of 10.7  fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV. The extinction model studied in this analysis is motivated by the search for signatures of strong gravity at the TeV scale (terascale gravity) and assumes the existence of string couplings in the strong-coupling limit. In this limit, the string model predicts the suppression of all high-transverse-momentum standard model processes, including jet production, beyond a certain energy scale. To test this prediction, the measured transverse-momentum spectrum is compared to the theoretical prediction of the standard model. No significant deficit of events is found at high transverse momentum. A 95% confidence level lower limit of 3.3 TeV is set on the extinction mass scale

Searches for electroweak neutralino and chargino production in channels with Higgs, Z, and W bosons in pp collisions at 8 TeV

Searches for supersymmetry (SUSY) are presented based on the electroweak pair production of neutralinos and charginos, leading to decay channels with Higgs, Z, and W bosons and undetected lightest SUSY particles (LSPs). The data sample corresponds to an integrated luminosity of about 19.5 fb(-1) of proton-proton collisions at a center-of-mass energy of 8 TeV collected in 2012 with the CMS detector at the LHC. The main emphasis is neutralino pair production in which each neutralino decays either to a Higgs boson (h) and an LSP or to a Z boson and an LSP, leading to hh, hZ, and ZZ states with missing transverse energy (E-T(miss)). A second aspect is chargino-neutralino pair production, leading to hW states with E-T(miss). The decays of a Higgs boson to a bottom-quark pair, to a photon pair, and to final states with leptons are considered in conjunction with hadronic and leptonic decay modes of the Z and W bosons. No evidence is found for supersymmetric particles, and 95% confidence level upper limits are evaluated for the respective pair production cross sections and for neutralino and chargino mass values

ИНФОРМАЦИОННАЯ БЕЗОПАСНОСТЬ КОРПОРАЦИЙ НА ПРИМЕРЕ ПРЕДПРИЯТИЙ АВТОПРОМА

The article defines the essence of corporate security, the supply of information protection, located in the information system of the showroom. Models of information threats are considered and a generalized characteristic of the information system as objects of protection is given. The order and efficiency of information protection in the corporate network is given when putting it into operation.В статье раскрывается сущность корпоративной безопасности, снабжения защиты информации, находящейся в информационной системе автосалона. Рассматриваются модели угроз информации и дается обобщенная характеристика информационной системы как объектов защиты. Приводится порядок и эффективность защиты информации в корпоративной сети при вводе её в эксплуатацию

ИНФОРМАЦИОННАЯ БЕЗОПАСНОСТЬ КОРПОРАЦИЙ НА ПРИМЕРЕ ПРЕДПРИЯТИЙ АВТОПРОМА

The article defines the essence of corporate security, the supply of information protection, located in the information system of the showroom. Models of information threats are considered and a generalized characteristic of the information system as objects of protection is given. The order and efficiency of information protection in the corporate network is given when putting it into operation.В статье раскрывается сущность корпоративной безопасности, снабжения защиты информации, находящейся в информационной системе автосалона. Рассматриваются модели угроз информации и дается обобщенная характеристика информационной системы как объектов защиты. Приводится порядок и эффективность защиты информации в корпоративной сети при вводе её в эксплуатацию

Synthesis of 3-alkyl-2, 4, 6-triphenylpyridines and 1,3-diphenyl-4- and-2-azafluorenes

The previously unknown 3-alkyl-2,4,6-triphenylpyridines were obtained from 1-methyl-3-alkyl-2, 6-diphenyl-4-piperidones. It was established that a mixture of 1,3-diphenyl-4-azafluorene and 1,3-diphenyl-2-azafluorene is formed in the dehydrocyclization of 3-methyl-2,4,6-triphenylpyridine. © 1976 Plenum Publishing Corporation